Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.

Check the render method of Home.

Next.js version: 15.5.4 (Turbopack)

TL;DR

• The issue is likely related to compatibility between Next.js and React 19.2.0, specifically with React Activities, and may require a workaround or update to a future version of Next.js.

Guidance

• Verify that the issue persists when creating a new Next.js project with the same versions of React and React DOM to isolate the problem.
• Check the official Next.js and React documentation for any known issues or compatibility notes regarding React Activities.
• Consider testing with an earlier version of React to see if the issue is specific to version 19.2.0.
• Review the code changes made when introducing React Activities, specifically the commit mentioned, to ensure that all components are properly exported and imported.

Example

• No specific code example can be provided without more details on the implementation of React Activities in the project.

Notes

• The issue seems to be specific to Next.js, as the same functionality works in a TanStack Router project.
• The problem persists across different versions of Next.js, including the latest canary version, suggesting a deeper compatibility issue.

Recommendation

• Apply workaround: Given the persistence of the issue across different Next.js versions, a workaround may be necessary until an official fix is released, such as modifying the component export/import structure or using an alternative approach to React Activities if possible.